Question

The sum of three times a number and 10 is 31.Find the number.

Answer 1

Answer:

7

Step-by-step explanation:

Let the number be n.

$3n+10=31$

Subtract 10 from both sides:

$3n+10-10=31-10$

$3n=21$

Divide both sides by 3:

$\frac{3n}{3}=\frac{21}{3}$

$n=7$